CAJ | 학술논문

采用湿法冶金处理技术研究了废旧镍氢电池正极材料中钴的最佳浸出条件。分别考察了酸的种类、酸的浓度、溶解时间和溶解温度对废旧镍氢电池正极材料中钴的浸出率的影响，研究结果表明：当采用硫酸作为溶剂，硫酸浓度为3 mol/L、溶解时间为4 h和溶解温度为70℃时，钴的浸出率最高，可达90%。通过加入过硫酸铵氧化剂的方法，将Co2+氧化成Co3+，调节体系pH值，形成氢氧化钴沉淀，并对沉淀物进行煅烧处理。利用XRD对回收产物进行表征，结果表明所得产物的图谱与标准Co3O4的图谱基本一致。本方法产品回收率高达80%。
채용습법야금처리기술연구료폐구얼경전지정겁재료중고적최가침출조건。분별고찰료산적충류、산적농도、용해시간화용해온도대폐구얼경전지정겁재료중고적침출솔적영향，연구결과표명：당채용류산작위용제，류산농도위3 mol/L、용해시간위4 h화용해온도위70℃시，고적침출솔최고，가체90%。통과가입과류산안양화제적방법，장Co2+양화성Co3+，조절체계pH치，형성경양화고침정，병대침정물진행단소처리。이용XRD대회수산물진행표정，결과표명소득산물적도보여표준Co3O4적도보기본일치。본방법산품회수솔고체80%。
Recovery of cobalt from the cathode material of waste Ni-MH battery with hydrometallurgical process was studied in this paper. The effect of acid species, concentration of acid, temperature of solution and time of dissolution to the leaching rate of cobalt was studied. The experiment results showed the leaching rate reached the optimum when using sulfuric acid as solvent, concentration of sulfuric acid being 3 mol/L, temperature being 70 ℃ and reaction time being 4 h. Co2+ was transformed to Co3+ by adding ammonium peroxydisulfate. Cobalt was recovered in the form of trivalent cobalt hydroxide precipitation by adjusting pH of the system. Cobalt was recycled by forming Co(OH)3. The precipitation was calcined. The cobalt recovery products were characterized by XRD, the XRD spectrogram was matching well with Co3O4, the recovery of cobalt reached to 80%in this method.